//package com.yiwuzhijia.ddyp.mvp.listener;
//
//import com.google.android.material.appbar.AppBarLayout;
//
//public abstract class AppBarStateChangeListener implements AppBarLayout.OnOffsetChangedListener {
//    public enum State {
//        EXPANDED,
//        COLLAPSED,
//        IDLE
//    }
//    private State mCurrentState = State.IDLE;
//    @Override
//    public final void onOffsetChanged(AppBarLayout appBarLayout, int i) {
//        if (i == 0) {
//            if (mCurrentState != State.EXPANDED) {
//                onStateChanged(appBarLayout, State.EXPANDED);
//            }
//            mCurrentState = State.EXPANDED;
//        } else if (Math.abs(i) >= appBarLayout.getTotalScrollRange()) {
//            if (mCurrentState != State.COLLAPSED) {
//                onStateChanged(appBarLayout, State.COLLAPSED);
//            }
//            mCurrentState = State.COLLAPSED;
//        } else {
//            if (mCurrentState != State.IDLE) {
//                onStateChanged(appBarLayout, State.IDLE);
//            }
//            mCurrentState = State.IDLE;
//        }
//    }
//    public abstract void onStateChanged(AppBarLayout appBarLayout, State state);
//
//
//
//}